woohoo , got it working!
yeah it was windows related , from ryan w link i was "drived" on msconfig too, so yeah i remember now i did set this on 6 for my 1090t and there was no option to go to 8....so as recommended on the site i installed EasyBCD to reset "the core use"....i probably did a bad manip or misunderstood the instruction because it have end with a wrong setting with 0 cores and windows not booting anymore....lol

currently on a fresh w7 reinstall and all 8 cores monitored and working

thx a lot for help, it have put me on the tracks Edited by UncleBlitz - 11/14/12 at 9:02am

to not share only problems, this cpu is really nice, here are some results:

the chip clocks higher with 8 cores than the previous one with 6 :-D

5.3ghz v-core-bios setting=1.475v LLC:extreme ,no problems to run some benches but it require more juice to be stable,temperatures are still very low under full charge so it seems i have some room to increase the voltage